??? Set Points For Different Battery Types
I'm just learning, with a smidgen of comprehension thrown in, set points for charging batteries. Are the set points the same for ALL AGM batteries, for ALL FLOODED/WET batteries, for ALL GEL batter...
Forum Discussion
Sam Spade wrote:
It's comments like this that confuse people.
First, unless you do something REALLY stupid, you can not "dry out" an AGM battery. The water that electrolyzes re-combines back into water.
Second, having the charging voltage a couple of tenths lower than optimal will NOT cause any damage to an AGM battery; nada, none.
You certainly can "dry out" an AGM battery. Where do you think it's water vapor goes when you have too-high voltages (for the air temperature around it) applied to it too long? Out it's one-way valve is where the water vapor goes ... until eventually you have a dried out AGM battery. I figured this out long ago and a LifeLine technician recently confirmed this to me over the phone. It's the same electro-chemical process that causes a wet cell battery to get "low on water".
The LifeLine tech told me that their AGM batteries should NOT be floated month after month at more than around 13.4 volts maximum (adjusted for the air temperature around it) to prevent them from drying out. So, I bought another brand of AGM battery that could be floated month after month at around the highter 13.6 volts .... without loosing water through it's one-way valve ("drying out") from constant hookup to our stock 13.6-13.8 volt Parallax converter.
However, our AGM RV batteries also charge fast enough at those same 13.6-13.8 volt converter voltages so as to be fine for our camping style.
